The present invention relates to a processing method for bone graft material using teeth by separating an extracted tooth by region and processing the extracted tooth to allow regional powders to be independently used or mixed depending on a use such as graft material comprises the following steps: (a) cutting a tooth extracted from a patient at the boundary between the dental crown and the dental root of the tooth (b) removing the missing region of the horizontally cut dental crown of a tooth, soft tissue and pulp tissue (c) quick-freezing the tissue of the dental crown and pulverizing the same to prepare a powder having an average diameter of 200-1,500 µm (d) degreasing the powder (e) dehydrating the powder and (f) carrying out a post-process including at least a sterilization with respect to the degreased and dehydrated powder to prepare a bone graft material.
